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Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel update (USN-4041-1)

high Nessus Plugin ID 126374

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-4041-1 advisory.

 USN-4017-1 fixed vulnerabilities in the Linux kernel for Ubuntu. Unfortunately, the update introduced a regression that interfered with networking applications that setup very low SO_SNDBUF values. This update fixes the problem.

 We apologize for the inconvenience.

 Jonathan Looney discovered that the Linux kernel could be coerced into segmenting responses into multiple TCP segments. A remote attacker could construct an ongoing sequence of requests to cause a denial of service.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected kernel package.

See Also

https://ubuntu.com/security/notices/USN-4041-1

Plugin Details

Severity: High

ID: 126374

File Name: ubuntu_USN-4041-1.nasl

Version: 1.11

Type: local

Agent: unix

Published: 7/1/2019

Updated: 8/27/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2019-11479

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-25-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1045-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-154-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-25-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-1023-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1049-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1036-gcp, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1118-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-154-powerpc64-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-54-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-54-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1114-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1057-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1036-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-154-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1087-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-25-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1017-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1051-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-154-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1043-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1040-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-154-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1038-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-25-generic-lpae, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-154-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-154-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-54-generic-lpae

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 6/29/2019

Vulnerability Publication Date: 6/19/2019

Reference Information

CVE: CVE-2019-11479

USN: 4041-1